/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlet;

import generated.ShoppingCart;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Vector;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.netbeans.xml.schema.accountschema.Users.User;

/**
 *
 * @author Red Army
 */
public class editCart extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        HttpSession session = request.getSession(true);
        //get parameter from the section
        //String username = (String) session.getAttribute("username");
        //User user = (User) session.getAttribute("USER");
        String itemID = request.getParameter("itemID");
        String itemQuantity = request.getParameter("itemQuantity");
        String itemNewQuantity = request.getParameter("optNewQuantity");
        //declare some variable for store the cart
        ShoppingCart shop = new ShoppingCart();
        String fileName = session.getId() + "_shoppingCart.xml";
        File file = new File(getServletContext().getRealPath("/WEB-INF/" + fileName));
        Vector itemList = new Vector();
        try {
            //read Dom to list
            servlet.Process.readDOM(file, itemList);
            servlet.Process.editCart(itemID, itemQuantity, itemList, itemNewQuantity);
            Process.writeToFile(file, itemList, shop);
            System.out.printf(file.getPath());

            //servlet.Process.writeToFile(fileName, itemList);
            RequestDispatcher rd = request.getRequestDispatcher("shoppingcart.jsp");
            rd.forward(request, response);
        } finally {
            out.close();
        }    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
